Sign holder



FIG. 1 is a perspective view of a sign holder showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a right side view thereof, the left side view being a mirrorimage.

The broken lines illustrate portions of the sign holder and form no partof the claimed design.

CLAIM The ornamental design for a sign holder, as shown and described.